Effect of Using ECC Layer on the Flexural Performance of RC Beams Previously Strengthened with EB CFRP Laminates

This paper studies the efficiency of applying an engineered cementitious composite (ECC) layer to tensile surface (RC) beams that were previously strengthened using externally bonded (EB) carbon fiber-reinforced polymer (CFRP) laminates. One control and ten RC produced tested utilizing a four-point loading regime. For beams, two kept only CFRP, additional ECC layers added rest beams. The CFRP width overlap length position among test factors. Experimental results revealed strengthening with laminates enhanced both stiffness flexural capacity Additional enhancements obtained through application layers. existence alongside laminate improved by 102% 125% when widths 50 mm 100 mm, respectively, was average value 318%. Three-dimensional (3D) finite element models (FEMs) developed ABAQUS software verified against experimental model response used conduct parametric study consider effect thickness reinforcement ratio on beam behavior. numerical more significant than in enhancing load-displacement response, especially after cracking stage.